Given a 32-bit signed integer, reverse digits of an integer.
Example 1:
Input: 123
Output: 321
Example 2:
Input: -123
Output: -321
Example 3:
Input: 120
Output: 21
Note:
Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−231, 231 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.
#include<iostream>
using namespace std;
#include<limits.h>
class Solution {
public:
int reverse(int x) {
long res=0;
while(x!=0){
res = 10*res + x%10;
x=x/10;
}
return (res>INT_MAX || res<INT_MIN)? 0:res;
}
};
int main(){
Solution S;
cout << S.reverse(-1002);
return 0;
}
参考网址:http://www.cnblogs.com/grandyang/p/4125588.html
https://leetcode.com/problems/reverse-integer/